Lee Kai Xuan / mbed-os

mbed-os

Fork of mbed-os by erkin yucel

targets/TARGET_STM/TARGET_STM32L1/sleep.c@0:f269e3021894, 2016-10-23 (annotated)

Committer:
elessair
Date:
Sun Oct 23 15:10:02 2016 +0000
Revision:
0:f269e3021894
Initial commit

Who changed what in which revision?

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elessair 0:f269e3021894 1 /* mbed Microcontroller Library
elessair 0:f269e3021894 2 *******************************************************************************
elessair 0:f269e3021894 3 * Copyright (c) 2014, STMicroelectronics
elessair 0:f269e3021894 4 * All rights reserved.
elessair 0:f269e3021894 5 *
elessair 0:f269e3021894 6 * Redistribution and use in source and binary forms, with or without
elessair 0:f269e3021894 7 * modification, are permitted provided that the following conditions are met:
elessair 0:f269e3021894 8 *
elessair 0:f269e3021894 9 * 1. Redistributions of source code must retain the above copyright notice,
elessair 0:f269e3021894 10 * this list of conditions and the following disclaimer.
elessair 0:f269e3021894 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
elessair 0:f269e3021894 12 * this list of conditions and the following disclaimer in the documentation
elessair 0:f269e3021894 13 * and/or other materials provided with the distribution.
elessair 0:f269e3021894 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
elessair 0:f269e3021894 15 * may be used to endorse or promote products derived from this software
elessair 0:f269e3021894 16 * without specific prior written permission.
elessair 0:f269e3021894 17 *
elessair 0:f269e3021894 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
elessair 0:f269e3021894 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
elessair 0:f269e3021894 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
elessair 0:f269e3021894 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
elessair 0:f269e3021894 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
elessair 0:f269e3021894 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
elessair 0:f269e3021894 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
elessair 0:f269e3021894 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
elessair 0:f269e3021894 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
elessair 0:f269e3021894 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
elessair 0:f269e3021894 28 *******************************************************************************
elessair 0:f269e3021894 29 */
elessair 0:f269e3021894 30 #include "sleep_api.h"
elessair 0:f269e3021894 31 #include "hal_tick.h"
elessair 0:f269e3021894 32 #include "rtc_api_hal.h"
elessair 0:f269e3021894 33
elessair 0:f269e3021894 34 #if DEVICE_SLEEP
elessair 0:f269e3021894 35
elessair 0:f269e3021894 36 #include "cmsis.h"
elessair 0:f269e3021894 37
elessair 0:f269e3021894 38 static TIM_HandleTypeDef TimMasterHandle;
elessair 0:f269e3021894 39
elessair 0:f269e3021894 40 void sleep(void) {
elessair 0:f269e3021894 41 // Stop HAL systick
elessair 0:f269e3021894 42 HAL_SuspendTick();
elessair 0:f269e3021894 43 // Request to enter SLEEP mode
elessair 0:f269e3021894 44 HAL_PWR_EnterSLEEPMode(PWR_MAINREGULATOR_ON, PWR_SLEEPENTRY_WFI);
elessair 0:f269e3021894 45 // Restart HAL systick
elessair 0:f269e3021894 46 HAL_ResumeTick();
elessair 0:f269e3021894 47 }
elessair 0:f269e3021894 48
elessair 0:f269e3021894 49
elessair 0:f269e3021894 50 void deepsleep(void)
elessair 0:f269e3021894 51 {
elessair 0:f269e3021894 52 #if defined(TARGET_MOTE_L152RC)
elessair 0:f269e3021894 53 int8_t STOPEntry = PWR_STOPENTRY_WFI;
elessair 0:f269e3021894 54 #endif
elessair 0:f269e3021894 55
elessair 0:f269e3021894 56 // Stop HAL systick
elessair 0:f269e3021894 57 TimMasterHandle.Instance = TIM_MST;
elessair 0:f269e3021894 58
elessair 0:f269e3021894 59 #if defined(TARGET_MOTE_L152RC)
elessair 0:f269e3021894 60 /* Select the regulator state in Stop mode: Set PDDS and LPSDSR bit according to PWR_Regulator value */
elessair 0:f269e3021894 61 MODIFY_REG(PWR->CR, (PWR_CR_PDDS | PWR_CR_LPSDSR), PWR_LOWPOWERREGULATOR_ON);
elessair 0:f269e3021894 62
elessair 0:f269e3021894 63 /* Set SLEEPDEEP bit of Cortex System Control Register */
elessair 0:f269e3021894 64 SET_BIT(SCB->SCR, ((uint32_t)SCB_SCR_SLEEPDEEP_Msk));
elessair 0:f269e3021894 65
elessair 0:f269e3021894 66 /* Select Stop mode entry --------------------------------------------------*/
elessair 0:f269e3021894 67 if(STOPEntry == PWR_STOPENTRY_WFI)
elessair 0:f269e3021894 68 {
elessair 0:f269e3021894 69 /* Request Wait For Interrupt */
elessair 0:f269e3021894 70 __WFI();
elessair 0:f269e3021894 71 }
elessair 0:f269e3021894 72 else
elessair 0:f269e3021894 73 {
elessair 0:f269e3021894 74 /* Request Wait For Event */
elessair 0:f269e3021894 75 __SEV();
elessair 0:f269e3021894 76 __WFE();
elessair 0:f269e3021894 77 __WFE();
elessair 0:f269e3021894 78 }
elessair 0:f269e3021894 79 __NOP();
elessair 0:f269e3021894 80 __NOP();
elessair 0:f269e3021894 81 __NOP();
elessair 0:f269e3021894 82 /* Reset SLEEPDEEP bit of Cortex System Control Register */
elessair 0:f269e3021894 83 CLEAR_BIT(SCB->SCR, ((uint32_t)SCB_SCR_SLEEPDEEP_Msk));
elessair 0:f269e3021894 84 #else
elessair 0:f269e3021894 85 // Request to enter STOP mode with regulator in low power mode
elessair 0:f269e3021894 86 HAL_PWR_EnterSTOPMode(PWR_LOWPOWERREGULATOR_ON, PWR_STOPENTRY_WFI);
elessair 0:f269e3021894 87 #endif
elessair 0:f269e3021894 88
elessair 0:f269e3021894 89 // After wake-up from STOP reconfigure the PLL
elessair 0:f269e3021894 90 SetSysClock();
elessair 0:f269e3021894 91
elessair 0:f269e3021894 92 // Restart HAL systick
elessair 0:f269e3021894 93 HAL_ResumeTick();
elessair 0:f269e3021894 94
elessair 0:f269e3021894 95 #if DEVICE_LOWPOWERTIMER
elessair 0:f269e3021894 96 rtc_synchronize();
elessair 0:f269e3021894 97 #endif
elessair 0:f269e3021894 98 }
elessair 0:f269e3021894 99
elessair 0:f269e3021894 100 #endif